Laserfiche WebLink
<br />the 18,915 square miles of the Arkansas River basin above the dam. It <br />provides 350,951 acre.feet of storage space for conservation and <br />recreation. John Martin Reservoir supplies water to the irrigated lands <br />below tbe dam as far as Garden City. Kansas. The top of the con. <br />servation pool is ~.851 feet above mean sea level, which provides <br />350,951 acre.feet of storage for irrigation. The release of stored nood <br />waters in excess of the conservation and recreation plots and above <br />elevation 3,851 feet is planned so that, when combined with nows <br />originating downstream from the dam, the capacity of the channel will <br />not be exceeded. Upon request of the Arkansas River Compact <br />Administration, irrigation water for downstream water users is <br />released through the outlet works in the base of the dam. Do,,'nstream <br />nood damages prevented by John Martin dam already exceed the cost <br />or'the project. Benefits have already passed the $92 million mark, <br />Recreation and favorable fish and wildlife habitats are derived from <br />this project. With reservoir lands open to all, there are many attractive <br />public use areas for outdoor recreation, water sports. fishing and <br />boating, or just relaxed living. During construction some embankment <br />material was obtained Cram a 75-acre tract of land immediately <br />downstream of the dam. This excavated area, averaging 12 feet deep. <br />filled with water and formed Lake Hasty, the center of year-round <br />recreation. <br />John Martin Dam consists of a concrete gravity structure 1,644 feet <br />long and 120 feet high, and an earthfill structure 2,600 feet long. The <br />concrete gravity structure contains a gated spillway provided with <br />sixteen 30 feet by 64 feet tainter !liltes with their operating machinery. <br />There are earthen Wing dams on either side of the main dam. The <br />north wing dam is 3,880 feet long, connecting to the earthfill structure <br />of the main dam at the north abutment, The south wing dam is 5.807 <br />feet long and connects to the south end of the concrete structure of the <br />main dam. A bituminous-surfaced roadway, 21 feet wide, extends along <br />the crest of the north wing dam, main dam, and south wing dam. The <br />overall length of the structure is 2,6 miles. Detailed pro.iec~ data are <br />shown below. <br />DAM <br />Total length, feet, <br />Maximum height above streambed, feet ' , <br />Width of roadway on dam, feet, <br /> <br />13.945 <br />118 <br />21 <br /> <br />SPILLWAY <br />Total length, including piers, feet "" <br />Crest gates, 30' x 64' , <br />Discharge capacity, cubic feet per second. <br /> <br />1.174 <br />16 <br />. ..639,200 <br /> <br />OUTLET WORKS <br />Sluicing conduits, 6' x 7';" " <br />Regulating conduits, 4' x 4' <br /> <br />4 <br />2 <br /> <br />RESERVOIR <br />Capacity, acre.feet, , . , ,621,326 <br />Flood control storage, acre-feet. ,. ., ,270.375 <br />Conservation (irrigation) and recreation, storage, acre-feet. . . . .350.951 <br />Water swiace at spillway crest, acres. 8.960 <br /> <br />---6- <br />